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My bike sports a DIY headlight I made out of about $50 in parts available at SparkFun.com. The headlight is powered by Grin Technology’s 12v voltage regulator which can take any ebike battery input from 24 to 72v and output the 12v required by the headlight. I’ve also used the 12v output to recharge my phone on long trips. The advantage of this centralized electrical system over a “regular” bike’s discrete lights is that I just have one switch to turn on all my lights and accessories, and I only have one battery and that battery is rechargeable.

My bike sports a DIY headlight I made out of about $50 in parts available at SparkFun.com. The headlight is powered by Grin Technology’s 12v voltage regulator which can take any ebike battery input from 24 to 72v and output the 12v required by the headlight. I’ve also used the 12v output to recharge my phone on long trips. The advantage of this centralized electrical system over a “regular” bike’s discrete lights is that I just have one switch to turn on all my lights and accessories, and I only have one battery and that battery is rechargeable.